Mark Dickinson <[EMAIL PROTECTED]> wrote: > On SuSE 10.2/Xeon there seems to be a rounding bug for > floating-point addition: > > [EMAIL PROTECTED]:~> python > Python 2.5 (r25:51908, May 25 2007, 16:14:04) > [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2 > Type "help", "copyright", "credits" or "license" for more information. >>>> a = 1e16-2. >>>> a > 9999999999999998.0 >>>> a+0.999 # gives expected result > 9999999999999998.0 >>>> a+0.9999 # doesn't round correctly. > 10000000000000000.0 > > The last result here should be 9999999999999998.0, > not 10000000000000000.0. Is anyone else seeing this > bug, or is it just a quirk of my system?
On my system, it works: Python 2.5.2 (r252:60911, May 21 2008, 18:49:26) [GCC 4.1.2 (Gentoo 4.1.2 p1.0.2)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> a = 1e16 - 2.; a 9999999999999998.0 >>> a + 0.9999 9999999999999998.0 Marc -- http://mail.python.org/mailman/listinfo/python-list
